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Subtract 1/45 from 90/20

1st number: 4 10/20, 2nd number: 1/45

90/20 - 1/45 is 403/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 45 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    90/20 = 90 × 9/20 × 9 = 810/180
  3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
    1/45 = 1 × 4/45 × 4 = 4/180
  4. Subtract the two like fractions:
    810/180 - 4/180 = 810 - 4/180 = 806/180
  5. After reducing the fraction, the answer is 403/90
  6. In mixed form: 443/90

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